21111345334 has 16 divisors (see below), whose sum is σ = 31907040480. Its totient is φ = 10475798400.

The previous prime is 21111345323. The next prime is 21111345347. The reversal of 21111345334 is 43354311112.

It is a super-2 number, since 2×21111345334² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 290142 + ... + 355534.

It is an arithmetic number, because the mean of its divisors is an integer number (1994190030).

Almost surely, 2^21111345334 is an apocalyptic number.

21111345334 is a deficient number, since it is larger than the sum of its proper divisors (10795695146).

21111345334 is a wasteful number, since it uses less digits than its factorization.

21111345334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66615.

The product of its digits is 4320, while the sum is 28.

Adding to 21111345334 its reverse (43354311112), we get a palindrome (64465656446).

The spelling of 21111345334 in words is "twenty-one billion, one hundred eleven million, three hundred forty-five thousand, three hundred thirty-four".